| Tail Number / N-Number | N121R |
| Manufacturer | BOEING |
| Model | PT-13D |
| Year Built | 1943 |
| Manufacturer's Serial Number | 75-5510 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | R1340 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 600 hp (448 kW) |
| Average Cruising Speed | 93 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | HERZOG CONTRACTING CORP |
| Street | 600 S RIVERSIDE RD PO BOX 1089 |
| City | ST JOSEPH |
| State | MO |
| Zip Code | 64502 |
| Region | Central |
| County | Buchanan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1979-04-18 |
| Certificate Issue Date | 1991-05-09 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 50054340 |
| Mode S Code Hex | A058E0 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121R.
| Tail Number / N-Number | N121R |
| Manufacturer | AEROFLITE AUTOGYRO |
| Model | DGH-1 |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AEROFLITE INC |
| Street | PO BOX 566 WILLIAMSON COUNTY AIRPORT |
| City | MARION |
| State | IL |
| Zip Code | 62922 |
| Region | Great Lakes |
| County | Buchanan County |
| Certificate Issue Date | 1959-04-24 |
| Last Status | Valid Registration |
| Cancellation Date | 1965-05-18 |